refactor ncc optimization, babel optimization

packages/next/build/babel/plugins/amp-attributes.ts

-import { NodePath, PluginObj } from '@babel/core'
-import { JSXOpeningElement } from '@babel/types'
+import { NodePath, PluginObj } from 'next/dist/compiled/babel--core'
+import { JSXOpeningElement } from 'next/dist/compiled/babel--types'
 
 export default function AmpAttributePatcher(...args: any): PluginObj {
   return {

packages/next/build/babel/plugins/commonjs.ts

-import { NodePath, PluginObj } from '@babel/core'
-import commonjsPlugin from '@babel/plugin-transform-modules-commonjs'
-import { Program } from '@babel/types'
+import { NodePath, PluginObj } from 'next/dist/compiled/babel--core'
+import commonjsPlugin from 'next/dist/compiled/babel--plugin-transform-modules-commonjs'
+import { Program } from 'next/dist/compiled/babel--types'
 
 // Rewrite imports using next/<something> to next-server/<something>
 export default function NextToNextServer(...args: any): PluginObj {

packages/next/build/babel/plugins/jsx-pragma.ts

-import { NodePath, PluginObj } from '@babel/core'
-import * as BabelTypes from '@babel/types'
+import { NodePath, PluginObj } from 'next/dist/compiled/babel--core'
+import * as BabelTypes from 'next/dist/compiled/babel--types'
 
 export default function({
   types: t,
@@ -7,7 +7,7 @@ export default function({
   types: typeof BabelTypes
 }): PluginObj<any> {
   return {
-    inherits: require('babel-plugin-syntax-jsx'),
+    inherits: require('next/dist/compiled/babel-plugin-syntax-jsx'),
     visitor: {
       JSXElement(path, state) {
         state.set('jsx', true)

packages/next/build/babel/plugins/next-data.ts

-import { NodePath, PluginObj } from '@babel/core'
-import * as BabelTypes from '@babel/types'
+import { NodePath, PluginObj } from 'next/dist/compiled/babel--core'
+import * as BabelTypes from 'next/dist/compiled/babel--types'
 
 export default function({
   types: t,

packages/next/build/babel/plugins/next-page-config.ts

-import { NodePath, PluginObj } from '@babel/core'
-import * as BabelTypes from '@babel/types'
+import { NodePath, PluginObj } from 'next/dist/compiled/babel--core'
+import * as BabelTypes from 'next/dist/compiled/babel--types'
 import { PageConfig } from 'next/types'
 
 const STRING_LITERAL_DROP_BUNDLE = '__NEXT_DROP_CLIENT_FILE__'

packages/next/build/babel/plugins/next-ssg-transform.ts

-import { NodePath, PluginObj } from '@babel/core'
-import * as BabelTypes from '@babel/types'
+import { NodePath, PluginObj } from 'next/dist/compiled/babel--core'
+import * as BabelTypes from 'next/dist/compiled/babel--types'
 import { SERVER_PROPS_SSG_CONFLICT } from '../../../lib/constants'
 import {
   STATIC_PROPS_ID,

packages/next/build/babel/plugins/optimize-hook-destructuring.ts

-import { NodePath, PluginObj } from '@babel/core'
-import * as BabelTypes from '@babel/types'
+import { NodePath, PluginObj } from 'next/dist/compiled/babel--core'
+import * as BabelTypes from 'next/dist/compiled/babel--types'
 
 // matches any hook-like (the default)
 const isHook = /^use[A-Z]/

packages/next/build/babel/plugins/react-loadable-plugin.ts

@@ -23,8 +23,8 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWAR
 // Modified to put `webpack` and `modules` under `loadableGenerated` to be backwards compatible with next/dynamic which has a `modules` key
 // Modified to support `dynamic(import('something'))` and `dynamic(import('something'), options)
 
-import { NodePath, PluginObj } from '@babel/core'
-import * as BabelTypes from '@babel/types'
+import { NodePath, PluginObj } from 'next/dist/compiled/babel--core'
+import * as BabelTypes from 'next/dist/compiled/babel--types'
 
 export default function({ types: t }: { types: typeof BabelTypes }): PluginObj {
   return {

packages/next/build/babel/preset.ts

-import { PluginItem } from '@babel/core'
+import { PluginItem } from 'next/dist/compiled/babel--core'
 const env = process.env.NODE_ENV
 const isProduction = env === 'production'
 const isDevelopment = env === 'development'
@@ -95,7 +95,7 @@ module.exports = (
     }
   }
 
-  // specify a preset to use instead of @babel/preset-env:
+  // specify a preset to use instead of @babel/preset-env
   const customModernPreset =
     isLaxModern && options['experimental-modern-preset']
 
@@ -103,11 +103,11 @@ module.exports = (
     sourceType: 'unambiguous',
     presets: [
       customModernPreset || [
-        require('@babel/preset-env').default,
+        require('next/dist/compiled/babel--preset-env').default,
         presetEnvConfig,
       ],
       [
-        require('@babel/preset-react'),
+        require('next/dist/compiled/babel--preset-react'),
         {
           // This adds @babel/plugin-transform-react-jsx-source and
           // @babel/plugin-transform-react-jsx-self automatically in development
@@ -116,7 +116,10 @@ module.exports = (
           ...options['preset-react'],
         },
       ],
-      [require('@babel/preset-typescript'), { allowNamespaces: true }],
+      [
+        require('next/dist/compiled/babel--preset-typescript'),
+        { allowNamespaces: true },
+      ],
     ],
     plugins: [
       [
@@ -138,20 +141,20 @@ module.exports = (
           lib: true,
         },
       ],
-      require('@babel/plugin-syntax-dynamic-import'),
+      require('next/dist/compiled/babel--plugin-syntax-dynamic-import'),
       require('./plugins/react-loadable-plugin'),
       [
-        require('@babel/plugin-proposal-class-properties'),
+        require('next/dist/compiled/babel--plugin-proposal-class-properties'),
         options['class-properties'] || {},
       ],
       [
-        require('@babel/plugin-proposal-object-rest-spread'),
+        require('next/dist/compiled/babel--plugin-proposal-object-rest-spread'),
         {
           useBuiltIns: true,
         },
       ],
       !isServer && [
-        require('@babel/plugin-transform-runtime'),
+        require('next/dist/compiled/babel--plugin-transform-runtime'),
         {
           corejs: false,
           helpers: true,
@@ -169,20 +172,27 @@ module.exports = (
       ],
       require('./plugins/amp-attributes'),
       isProduction && [
-        require('babel-plugin-transform-react-remove-prop-types'),
+        require('next/dist/compiled/babel-plugin-transform-react-remove-prop-types'),
         {
           removeImport: true,
         },
       ],
-      require('@babel/plugin-proposal-optional-chaining'),
-      require('@babel/plugin-proposal-nullish-coalescing-operator'),
-      isServer && require('@babel/plugin-syntax-bigint'),
-      [require('@babel/plugin-proposal-numeric-separator').default, false],
+      require('next/dist/compiled/babel--plugin-proposal-optional-chaining'),
+      require('next/dist/compiled/babel--plugin-proposal-nullish-coalescing-operator'),
+      isServer && require('next/dist/compiled/babel--plugin-syntax-bigint'),
+      [
+        require('next/dist/compiled/babel--plugin-proposal-numeric-separator')
+          .default,
+        false,
+      ],
     ].filter(Boolean),
     overrides: [
       {
         test: /\.tsx?$/,
-        plugins: [require('@babel/plugin-proposal-numeric-separator').default],
+        plugins: [
+          require('next/dist/compiled/babel--plugin-proposal-numeric-separator')
+            .default,
+        ],
       },
     ],
   }

packages/next/build/webpack/loaders/next-babel-loader.js

-import babelLoader from 'babel-loader'
+import babelLoader from 'next/dist/compiled/babel-loader'
 import { basename, join } from 'path'
 import hash from 'string-hash'
 
@@ -44,7 +44,7 @@ module.exports = babelLoader.custom(babel => {
     { type: 'plugin' }
   )
   const commonJsItem = babel.createConfigItem(
-    require('@babel/plugin-transform-modules-commonjs'),
+    require('next/dist/compiled/babel--plugin-transform-modules-commonjs'),
     { type: 'plugin' }
   )
 
@@ -180,7 +180,7 @@ module.exports = babelLoader.custom(babel => {
       }
 
       options.plugins.push([
-        require.resolve('babel-plugin-transform-define'),
+        require.resolve('next/dist/compiled/babel-plugin-transform-define'),
         {
           'process.env.NODE_ENV': development ? 'development' : 'production',
           'typeof window': isServer ? 'undefined' : 'object',

packages/next/build/webpack/plugins/next-esm-plugin.ts

@@ -170,7 +170,7 @@ export default class NextEsmPlugin implements Plugin {
 
           if (IS_PRESET_ENV.test(name)) {
             presets.push([
-              require.resolve('@babel/preset-modules'),
+              require.resolve('next/dist/compiled/babel--preset-modules'),
               { loose: true },
             ])
           } else {

packages/next/package.json

@@ -58,32 +58,12 @@
   },
   "dependencies": {
     "@ampproject/toolbox-optimizer": "2.0.1",
-    "@babel/core": "7.7.2",
-    "@babel/plugin-proposal-class-properties": "7.7.0",
-    "@babel/plugin-proposal-nullish-coalescing-operator": "7.7.4",
-    "@babel/plugin-proposal-numeric-separator": "7.8.3",
-    "@babel/plugin-proposal-object-rest-spread": "7.6.2",
-    "@babel/plugin-proposal-optional-chaining": "7.7.4",
-    "@babel/plugin-syntax-bigint": "7.8.3",
-    "@babel/plugin-syntax-dynamic-import": "7.2.0",
-    "@babel/plugin-transform-modules-commonjs": "7.7.0",
-    "@babel/plugin-transform-runtime": "7.6.2",
-    "@babel/preset-env": "7.7.1",
-    "@babel/preset-modules": "0.1.1",
-    "@babel/preset-react": "7.7.0",
-    "@babel/preset-typescript": "7.7.2",
     "@babel/runtime": "7.7.2",
-    "@babel/types": "7.7.4",
     "@next/polyfill-nomodule": "9.3.4-canary.0",
     "amphtml-validator": "1.0.30",
     "async-retry": "1.2.3",
     "async-sema": "3.0.0",
     "autodll-webpack-plugin": "0.4.2",
-    "babel-core": "7.0.0-bridge.0",
-    "babel-loader": "8.0.6",
-    "babel-plugin-syntax-jsx": "6.18.0",
-    "babel-plugin-transform-define": "2.0.0",
-    "babel-plugin-transform-react-remove-prop-types": "0.4.24",
     "browserslist": "4.8.3",
     "cache-loader": "4.1.0",
     "chalk": "2.4.2",
@@ -153,6 +133,21 @@
     "react-dom": "^16.6.0"
   },
   "devDependencies": {
+    "@babel/core": "7.7.2",
+    "@babel/plugin-proposal-class-properties": "7.7.0",
+    "@babel/plugin-proposal-nullish-coalescing-operator": "7.7.4",
+    "@babel/plugin-proposal-numeric-separator": "7.8.3",
+    "@babel/plugin-proposal-object-rest-spread": "7.6.2",
+    "@babel/plugin-proposal-optional-chaining": "7.7.4",
+    "@babel/plugin-syntax-bigint": "7.8.3",
+    "@babel/plugin-syntax-dynamic-import": "7.2.0",
+    "@babel/plugin-transform-modules-commonjs": "7.7.0",
+    "@babel/plugin-transform-runtime": "7.6.2",
+    "@babel/preset-env": "7.7.1",
+    "@babel/preset-modules": "0.1.1",
+    "@babel/preset-react": "7.7.0",
+    "@babel/preset-typescript": "7.7.2",
+    "@babel/types": "7.7.4",
     "@taskr/clear": "1.1.0",
     "@taskr/esnext": "1.1.0",
     "@taskr/watch": "1.1.0",
@@ -188,10 +183,14 @@
     "@types/webpack-dev-middleware": "2.0.3",
     "@types/webpack-hot-middleware": "2.16.5",
     "@types/webpack-sources": "0.1.5",
-    "@zeit/ncc": "0.18.5",
+    "@zeit/ncc": "0.22.0",
     "arg": "4.1.0",
     "ast-types": "0.13.2",
+    "babel-loader": "8.0.6",
     "babel-plugin-dynamic-import-node": "2.3.0",
+    "babel-plugin-syntax-jsx": "6.18.0",
+    "babel-plugin-transform-define": "2.0.0",
+    "babel-plugin-transform-react-remove-prop-types": "0.4.24",
     "dotenv": "8.2.0",
     "dotenv-expand": "5.1.0",
     "nanoid": "2.0.3",

packages/next/taskfile.js

@@ -8,39 +8,223 @@ export async function ncc_arg(task, opts) {
     .ncc({ packageName: 'arg' })
     .target('dist/compiled/arg')
 }
-
 // eslint-disable-next-line camelcase
-export async function ncc_resolve(task, opts) {
+export async function ncc_babel__core(task, opts) {
   await task
-    .source(opts.src || relative(__dirname, require.resolve('resolve')))
-    .ncc({ packageName: 'resolve' })
-    .target('dist/compiled/resolve')
+    .source(opts.src || relative(__dirname, require.resolve('@babel/core')))
+    .ncc({ packageName: '@babel/core' })
+    .target('dist/compiled/babel--core')
 }
-
 // eslint-disable-next-line camelcase
-export async function ncc_nanoid(task, opts) {
+export async function ncc_babel__plugin_proposal_class_properties(task, opts) {
   await task
-    .source(opts.src || relative(__dirname, require.resolve('nanoid')))
-    .ncc({ packageName: 'nanoid' })
-    .target('dist/compiled/nanoid')
+    .source(
+      opts.src ||
+        relative(
+          __dirname,
+          require.resolve('@babel/plugin-proposal-class-properties')
+        )
+    )
+    .ncc({ packageName: '@babel/plugin-proposal-class-properties' })
+    .target('dist/compiled/babel--plugin-proposal-class-properties')
 }
-
 // eslint-disable-next-line camelcase
-export async function ncc_unistore(task, opts) {
+export async function ncc_babel__plugin_proposal_nullish_coalescing_operator(
+  task,
+  opts
+) {
   await task
-    .source(opts.src || relative(__dirname, require.resolve('unistore')))
-    .ncc({ packageName: 'unistore' })
-    .target('dist/compiled/unistore')
+    .source(
+      opts.src ||
+        relative(
+          __dirname,
+          require.resolve('@babel/plugin-proposal-nullish-coalescing-operator')
+        )
+    )
+    .ncc({ packageName: '@babel/plugin-proposal-nullish-coalescing-operator' })
+    .target('dist/compiled/babel--plugin-proposal-nullish-coalescing-operator')
 }
-
 // eslint-disable-next-line camelcase
-export async function ncc_text_table(task, opts) {
+export async function ncc_babel__plugin_proposal_numeric_separator(task, opts) {
   await task
-    .source(opts.src || relative(__dirname, require.resolve('text-table')))
-    .ncc({ packageName: 'text-table' })
-    .target('dist/compiled/text-table')
+    .source(
+      opts.src ||
+        relative(
+          __dirname,
+          require.resolve('@babel/plugin-proposal-numeric-separator')
+        )
+    )
+    .ncc({ packageName: '@babel/plugin-proposal-numeric-separator' })
+    .target('dist/compiled/babel--plugin-proposal-numeric-separator')
+}
+// eslint-disable-next-line camelcase
+export async function ncc_babel__plugin_proposal_object_rest_spread(
+  task,
+  opts
+) {
+  await task
+    .source(
+      opts.src ||
+        relative(
+          __dirname,
+          require.resolve('@babel/plugin-proposal-object-rest-spread')
+        )
+    )
+    .ncc({ packageName: '@babel/plugin-proposal-object-rest-spread' })
+    .target('dist/compiled/babel--plugin-proposal-object-rest-spread')
+}
+// eslint-disable-next-line camelcase
+export async function ncc_babel__plugin_proposal_optional_chaining(task, opts) {
+  await task
+    .source(
+      opts.src ||
+        relative(
+          __dirname,
+          require.resolve('@babel/plugin-proposal-optional-chaining')
+        )
+    )
+    .ncc({ packageName: '@babel/plugin-proposal-optional-chaining' })
+    .target('dist/compiled/babel--plugin-proposal-optional-chaining')
+}
+// eslint-disable-next-line camelcase
+export async function ncc_babel__plugin_syntax_bigint(task, opts) {
+  await task
+    .source(
+      opts.src ||
+        relative(__dirname, require.resolve('@babel/plugin-syntax-bigint'))
+    )
+    .ncc({ packageName: '@babel/plugin-syntax-bigint' })
+    .target('dist/compiled/babel--plugin-syntax-bigint')
+}
+// eslint-disable-next-line camelcase
+export async function ncc_babel__plugin_syntax_dynamic_import(task, opts) {
+  await task
+    .source(
+      opts.src ||
+        relative(
+          __dirname,
+          // eslint-disable-next-line no-useless-concat
+          require.resolve('@babel/plugin-syntax-dynamic-i' + 'mport')
+        )
+    )
+    // eslint-disable-next-line no-useless-concat
+    .ncc({ packageName: '@babel/plugin-syntax-dynamic-i' + 'mport' })
+    // eslint-disable-next-line no-useless-concat
+    .target('dist/compiled/babel--plugin-syntax-dynamic-i' + 'mport')
+}
+// eslint-disable-next-line camelcase
+export async function ncc_babel__plugin_transform_modules_commonjs(task, opts) {
+  await task
+    .source(
+      opts.src ||
+        relative(
+          __dirname,
+          require.resolve('@babel/plugin-transform-modules-commonjs')
+        )
+    )
+    .ncc({ packageName: '@babel/plugin-transform-modules-commonjs' })
+    .target('dist/compiled/babel--plugin-transform-modules-commonjs')
+}
+// eslint-disable-next-line camelcase
+export async function ncc_babel__plugin_transform_runtime(task, opts) {
+  await task
+    .source(
+      opts.src ||
+        relative(__dirname, require.resolve('@babel/plugin-transform-runtime'))
+    )
+    .ncc({ packageName: '@babel/plugin-transform-runtime' })
+    .target('dist/compiled/babel--plugin-transform-runtime')
+}
+// eslint-disable-next-line camelcase
+export async function ncc_babel__preset_env(task, opts) {
+  await task
+    .source(
+      opts.src || relative(__dirname, require.resolve('@babel/preset-env'))
+    )
+    .ncc({ packageName: '@babel/preset-env' })
+    .target('dist/compiled/babel--preset-env')
+}
+// eslint-disable-next-line camelcase
+export async function ncc_babel__preset_modules(task, opts) {
+  await task
+    .source(
+      opts.src || relative(__dirname, require.resolve('@babel/preset-modules'))
+    )
+    .ncc({ packageName: '@babel/preset-modules' })
+    .target('dist/compiled/babel--preset-modules')
+}
+// eslint-disable-next-line camelcase
+export async function ncc_babel__preset_react(task, opts) {
+  await task
+    .source(
+      opts.src || relative(__dirname, require.resolve('@babel/preset-react'))
+    )
+    .ncc({ packageName: '@babel/preset-react' })
+    .target('dist/compiled/babel--preset-react')
+}
+// eslint-disable-next-line camelcase
+export async function ncc_babel__preset_typescript(task, opts) {
+  await task
+    .source(
+      opts.src ||
+        relative(__dirname, require.resolve('@babel/preset-typescript'))
+    )
+    .ncc({ packageName: '@babel/preset-typescript' })
+    .target('dist/compiled/babel--preset-typescript')
+}
+// eslint-disable-next-line camelcase
+export async function ncc_babel__types(task, opts) {
+  await task
+    .source(opts.src || relative(__dirname, require.resolve('@babel/types')))
+    .ncc({ packageName: '@babel/types' })
+    .target('dist/compiled/babel--types')
+}
+// eslint-disable-next-line camelcase
+export async function ncc_babel_loader(task, opts) {
+  await task
+    .source(opts.src || relative(__dirname, require.resolve('babel-loader')))
+    .ncc({
+      packageName: 'babel-loader',
+      externals: { '@babel/core': 'next/dist/compiled/babel--core' },
+    })
+    .target('dist/compiled/babel-loader')
+}
+// eslint-disable-next-line camelcase
+export async function ncc_babel_plugin_syntax_jsx(task, opts) {
+  await task
+    .source(
+      opts.src ||
+        relative(__dirname, require.resolve('babel-plugin-syntax-jsx'))
+    )
+    .ncc({ packageName: 'babel-plugin-syntax-jsx' })
+    .target('dist/compiled/babel-plugin-syntax-jsx')
+}
+// eslint-disable-next-line camelcase
+export async function ncc_babel_plugin_transform_define(task, opts) {
+  await task
+    .source(
+      opts.src ||
+        relative(__dirname, require.resolve('babel-plugin-transform-define'))
+    )
+    .ncc({ packageName: 'babel-plugin-transform-define' })
+    .target('dist/compiled/babel-plugin-transform-define')
+}
+// eslint-disable-next-line camelcase
+export async function ncc_babel_plugin_transform_react_remove_prop_types(
+  task,
+  opts
+) {
+  await task
+    .source(
+      opts.src ||
+        relative(
+          __dirname,
+          require.resolve('babel-plugin-transform-react-remove-prop-types')
+        )
+    )
+    .ncc({ packageName: 'babel-plugin-transform-react-remove-prop-types' })
+    .target('dist/compiled/babel-plugin-transform-react-remove-prop-types')
 }
-
 // eslint-disable-next-line camelcase
 export async function ncc_dotenv(task, opts) {
   await task
@@ -48,7 +232,6 @@ export async function ncc_dotenv(task, opts) {
     .ncc({ packageName: 'dotenv' })
     .target('dist/compiled/dotenv')
 }
-
 // eslint-disable-next-line camelcase
 export async function ncc_dotenv_expand(task, opts) {
   await task
@@ -56,16 +239,64 @@ export async function ncc_dotenv_expand(task, opts) {
     .ncc({ packageName: 'dotenv-expand' })
     .target('dist/compiled/dotenv-expand')
 }
+// eslint-disable-next-line camelcase
+export async function ncc_nanoid(task, opts) {
+  await task
+    .source(opts.src || relative(__dirname, require.resolve('nanoid')))
+    .ncc({ packageName: 'nanoid' })
+    .target('dist/compiled/nanoid')
+}
+// eslint-disable-next-line camelcase
+export async function ncc_resolve(task, opts) {
+  await task
+    .source(opts.src || relative(__dirname, require.resolve('resolve')))
+    .ncc({ packageName: 'resolve' })
+    .target('dist/compiled/resolve')
+}
+// eslint-disable-next-line camelcase
+export async function ncc_text_table(task, opts) {
+  await task
+    .source(opts.src || relative(__dirname, require.resolve('text-table')))
+    .ncc({ packageName: 'text-table' })
+    .target('dist/compiled/text-table')
+}
+// eslint-disable-next-line camelcase
+export async function ncc_unistore(task, opts) {
+  await task
+    .source(opts.src || relative(__dirname, require.resolve('unistore')))
+    .ncc({ packageName: 'unistore' })
+    .target('dist/compiled/unistore')
+}
 
 export async function precompile(task) {
   await task.parallel([
-    'ncc_unistore',
-    'ncc_resolve',
     'ncc_arg',
-    'ncc_nanoid',
-    'ncc_text_table',
+    'ncc_babel__core',
+    'ncc_babel__plugin_proposal_class_properties',
+    'ncc_babel__plugin_proposal_nullish_coalescing_operator',
+    'ncc_babel__plugin_proposal_numeric_separator',
+    'ncc_babel__plugin_proposal_object_rest_spread',
+    'ncc_babel__plugin_proposal_optional_chaining',
+    'ncc_babel__plugin_syntax_bigint',
+    // eslint-disable-next-line no-useless-concat
+    'ncc_babel__plugin_syntax_dynamic_i' + 'mport',
+    'ncc_babel__plugin_transform_modules_commonjs',
+    'ncc_babel__plugin_transform_runtime',
+    'ncc_babel__preset_env',
+    'ncc_babel__preset_modules',
+    'ncc_babel__preset_react',
+    'ncc_babel__preset_typescript',
+    'ncc_babel__types',
+    'ncc_babel_loader',
+    'ncc_babel_plugin_syntax_jsx',
+    'ncc_babel_plugin_transform_define',
+    'ncc_babel_plugin_transform_react_remove_prop_types',
     'ncc_dotenv',
     'ncc_dotenv_expand',
+    'ncc_nanoid',
+    'ncc_resolve',
+    'ncc_text_table',
+    'ncc_unistore',
   ])
 }
 

packages/next/telemetry/events/version.ts

@@ -26,7 +26,7 @@ type EventCliSessionStarted = {
 function hasBabelConfig(dir: string): boolean {
   try {
     const noopFile = path.join(dir, 'noop.js')
-    const res = require('@babel/core').loadPartialConfig({
+    const res = require('next/dist/compiled/babel--core').loadPartialConfig({
       cwd: dir,
       filename: noopFile,
       sourceFileName: noopFile,

packages/next/types/misc.d.ts

-declare module '@babel/plugin-transform-modules-commonjs'
+declare module 'next/dist/compiled/babel--plugin-transform-modules-commonjs'
 declare module 'webpack/lib/GraphHelpers'
 declare module 'webpack/lib/DynamicEntryPlugin'
 declare module 'unfetch'
@@ -13,42 +13,6 @@ declare module 'cssnano-simple' {
   export = cssnanoSimple
 }
 
-declare module 'next/dist/compiled/nanoid/index.js' {
-  function nanoid(size?: number): string
-
-  export = nanoid
-}
-
-declare module 'next/dist/compiled/unistore' {
-  import unistore from 'unistore'
-  export = unistore
-}
-
-declare module 'next/dist/compiled/resolve/index.js' {
-  import resolve from 'resolve'
-
-  export = resolve
-}
-
-declare module 'next/dist/compiled/text-table' {
-  function textTable(
-    rows: Array<Array<{}>>,
-    opts?: {
-      hsep?: string
-      align?: Array<'l' | 'r' | 'c' | '.'>
-      stringLength?(str: string): number
-    }
-  ): string
-
-  export = textTable
-}
-
-declare module 'next/dist/compiled/dotenv' {
-  import dotenv from 'dotenv'
-
-  export = dotenv
-}
-
 declare module 'next/dist/compiled/arg/index.js' {
   function arg<T extends arg.Spec>(
     spec: T,
@@ -76,6 +40,122 @@ declare module 'next/dist/compiled/arg/index.js' {
   export = arg
 }
 
+declare module 'next/dist/compiled/babel--core' {
+  import m from '@babel/core'
+  export = m
+}
+
+/*declare module 'next/dist/compiled/babel--plugin-proposal-class-properties' {
+  import m from '@babel/plugin-proposal-class-properties'
+  export = m
+}
+declare module 'next/dist/compiled/babel--plugin-proposal-nullish-coalescing-operator' {
+  import m from '@babel/plugin-proposal-nullish-coalescing-operator'
+  export = m
+}
+declare module 'next/dist/compiled/babel--plugin-proposal-numeric-separator' {
+  import m from '@babel/plugin-proposal-numeric-separator'
+  export = m
+}
+declare module 'next/dist/compiled/babel--plugin-proposal-object-rest-spread' {
+  import m from '@babel/plugin-proposal-object-rest-spread'
+  export = m
+}
+declare module 'next/dist/compiled/babel--plugin-proposal-optional-chaining' {
+  import m from '@babel/plugin-proposal-optional-chaining'
+  export = m
+}
+declare module 'next/dist/compiled/babel--plugin-syntax-bigint' {
+  import m from '@babel/plugin-syntax-bigint'
+  export = m
+}
+declare module 'next/dist/compiled/babel--plugin-syntax-dynamic-import' {
+  import m from '@babel/plugin-syntax-dynamic-import'
+  export = m
+}
+declare module 'next/dist/compiled/babel--plugin-transform-modules-commonjs' {
+  import m from '@babel/plugin-transform-modules-commonjs'
+  export = m
+}
+declare module 'next/dist/compiled/babel--plugin-transform-runtime' {
+  import m from '@babel/plugin-transform-runtime'
+  export = m
+}
+declare module 'next/dist/compiled/babel--preset-env' {
+  import m from '@babel/preset-env'
+  export = m
+}
+declare module 'next/dist/compiled/babel--preset-modules' {
+  import m from '@babel/preset-modules'
+  export = m
+}
+declare module 'next/dist/compiled/babel--preset-react' {
+  import m from '@babel/preset-react'
+  export = m
+}
+declare module 'next/dist/compiled/babel--preset-typescript' {
+  import m from '@babel/preset-typescript'
+  export = m
+}*/
+declare module 'next/dist/compiled/babel--types' {
+  import m from '@babel/types'
+  export = m
+}
+/*declare module 'next/dist/compiled/babel-loader' {
+  import m from 'babel-loader'
+  export = m
+}
+declare module 'next/dist/compiled/babel-plugin-syntax-jsx' {
+  import m from 'babel-plugin-syntax-jsx'
+  export = m
+}
+declare module 'next/dist/compiled/babel-plugin-transform-define' {
+  import m from 'babel-plugin-transform-define'
+  export = m
+}
+declare module 'next/dist/compiled/babel-plugin-transform-react-remove-prop-types' {
+  import m from 'babel-plugin-transform-react-remove-prop-types'
+  export = m
+}*/
+
+declare module 'next/dist/compiled/dotenv' {
+  import m from 'dotenv'
+  export = m
+}
+
+declare module 'next/dist/compiled/dotenv-expand' {
+  import m from 'dotenv-expand'
+  export = m
+}
+
+declare module 'next/dist/compiled/nanoid/index.js' {
+  function nanoid(size?: number): string
+  export = nanoid
+}
+
+declare module 'next/dist/compiled/resolve/index.js' {
+  import m from 'resolve'
+  export = m
+}
+
+declare module 'next/dist/compiled/text-table' {
+  function textTable(
+    rows: Array<Array<{}>>,
+    opts?: {
+      hsep?: string
+      align?: Array<'l' | 'r' | 'c' | '.'>
+      stringLength?(str: string): number
+    }
+  ): string
+
+  export = textTable
+}
+
+declare module 'next/dist/compiled/unistore' {
+  import m from 'unistore'
+  export = m
+}
+
 declare module 'autodll-webpack-plugin' {
   import webpack from 'webpack'
   class AutoDllPlugin implements webpack.Plugin {

yarn.lock

@@ -3147,10 +3147,10 @@
   resolved "https://registry.yarnpkg.com/@xtuc/long/-/long-4.2.2.tgz#d291c6a4e97989b5c61d9acf396ae4fe133a718d"
   integrity sha512-NuHqBY1PB/D8xU6s/thBgOAiAP7HOYDQ32+BFZILJ8ivkUkAHQnWfn6WhL79Owj1qmUnoN/YPhktdIoucipkAQ==
 
-"@zeit/ncc@0.18.5":
-  version "0.18.5"
-  resolved "https://registry.yarnpkg.com/@zeit/ncc/-/ncc-0.18.5.tgz#5687df6c32f1a2e2486aa110b3454ccebda4fb9c"
-  integrity sha512-F+SbvEAh8rchiRXqQbmD1UmbePY7dCOKTbvfFtbVbK2xMH/tyri5YKfNxXKK7eL9EWkkbqB3NTVQO6nokApeBA==
+"@zeit/ncc@0.22.0":
+  version "0.22.0"
+  resolved "https://registry.yarnpkg.com/@zeit/ncc/-/ncc-0.22.0.tgz#1a4132a375a2ffd1d6d632b0fdd9027154f6141a"
+  integrity sha512-zaS6chwztGSLSEzsTJw9sLTYxQt57bPFBtsYlVtbqGvmDUsfW7xgXPYofzFa1kB9ur2dRop6IxCwPnWLBVCrbQ==
 
 "@zeit/ncc@^0.20.4":
   version "0.20.5"